I have purchased highly reccomended joyflash 16gb, its indeed fast 14MB/s write 20MB/s read..only problem is that when phone connected over USB as mass storage, transfer speed (writing) is only around 4 MB/s and reading is 14MB/s. Both from internal memory and external SD. Anyone idea why is that? Is that a limitation of Samsungs USB interface?
I did testing with SDtools on my device when testing speed of microSD, for transfer speeds over the USB cable i have used total commander
Yes, I got the same, about 5Mb/s via USB connection
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I get 12mb/s with mine :S mind you that is with movies. With mp3's and smaller stuff i get much slower around 6mb/s. Class10 32gb
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re
tjjensen23 said:
I get 12mb/s with mine :S mind you that is with movies. With mp3's and smaller stuff i get much slower around 6mb/s. Class10 32gb
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Do you get those 12MBps(write) over usb? I have tried to copy large file=2gb movie, to enable constant write got the speed around 4MBps.
Its annoying to always take microSD out to get full speed, especially when one needs to take out battery first...
I think we need to be clear if this is MB or Mbs... On a Sandisk 16gb I get approx 12mpbs. That's megabits, so around 1.5 megaByte/sec
Related
My RAZR's external SD card speeds are extremely poor. I get 4MB/s transfer speeds. I used my SD card on my older phone and the speeds were much better, reached upto 8MB/s on the same set of files. I tried setting the read ahead cache to 2048 but nothing changed.
Does anyone else have slow SD card speeds?
Is there any possible fix for this?
Thanks!
Code:
1) what's yous sdcard class?
2) read ahead cache, is not bigger=better, let's try other values, not just the minimum and maximum, it changes it's optimum for each memory card
3) how did you measure your speeds? on my lg dual i had for example, my class10 sdcard
12w 17r on phone with sdtools
19w 25r using it as a memory reader
A fix for this is to get higher transfer rate sd card, say 10 mb/s. But it would be more expensive.
Sent from my XT910 using XDA App
I bought a class 10 sd card from amazon, which got a writing speed ~15m/s.
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I have a class 4 SD card. So my speeds won't be great, I know that. But my card used to manage better speeds before. Is the problem with the RAZR then?
I tried 128, 1024 and 2048. There was no change in the transfer speeds. I read these speeds off teracopy's window. Is there a tool for measuring read-write speeds for the SD card?
Try SD Tools, free in market.
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Hi guys, jus wanna knw if there is any difference in the performance of the phone (other than jus transferring files to n from pc) according to the class of the sd card?
Thanx
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Yes there is. The class tells you the transfer speed for witch the card is rated.
For example, my card is class 10. That means that its capable of transfer speeds of up to 10mb/s. Same for others.
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So that transfer speed of 10 mbps refers to the speed @ which files are being transferred to n from pc right?
My question is apart from that will it affect the performance of phone when i hv apps in ext (a2sd)
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Yes, speed class is guaranteed write-to-card speed in megabytes/second (read speed is usually even higher). Obviously, the bigger class, the better, but high-class also much pricier. And you unlikely too see much speed difference if you just want to put some apps on SD card (well, depends on the app - some games are 300Mb+, and you'd see the difference).
But if you for example want to watch movies on your phone, you may find that slow speed class, like 2, is a pita to wait for while a movie transfers from your pc ;-). Class 10 would be a real hit then (especially if you write files using a cardreader, it may be not as good via USB to a phone).
Hv a class 2 1gb card, planning to get class 6 8gb card. So i should see significant performance improvements while havin ext partition right?
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Hi
Please any one live in Jordan-ME
Help me with SdCard
I want 8GB or 16GB SDcard for my XM ?
How much will cost me and any advice before i buy it ?
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hejawi said:
Hi
Please any one live in Jordan-ME
Help me with SdCard
I want 8GB or 16GB SDcard for my XM ?
How much will cost me and any advice before i buy it ?
Sent from my ST15i using xda app-developers app
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Don't know how much will it cost.
Priority is card speed. Higher class is faster: http://en.wikipedia.org/wiki/Secure_Digital#Speed_Class_Rating
dont know the cost...my advice go for sandisk HC mem card class6 or a class 10...ur phone performance vl increase gradually ..
iam using a class 6 16gb my xpm is pretty faster than before.
sandy7 said:
dont know the cost...my advice go for sandisk HC mem card class6 or a class 10...ur phone performance vl increase gradually ..
iam using a class 6 16gb my xpm is pretty faster than before.
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Phone performance isn't affected by SDcard.
The only difference you can see is when you read/write files from SD, nothing more.
Web browsing doesn't get faster with higher class SDcard. Calling doesn't get better with higher class SDcard.
And Class 4 is enough for Android, I've never had problems with it and the speed is enough for me.
Someguyfromhell said:
Phone performance isn't affected by SDcard.
The only difference you can see is when you read/write files from SD, nothing more.
Web browsing doesn't get faster with higher class SDcard. Calling doesn't get better with higher class SDcard.
And Class 4 is enough for Android, I've never had problems with it and the speed is enough for me.
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If you want to copy about 4 GB of data to SD from PC with class4 card and then copy same file/s to class10 card the time is a lot shorter with class10!
This is why many people use higher card class.
And when you want to have system in externel memory* this require minimum class6 card to avoid lags.
* e.g. HTC HD2
my Sdcard is 16GB class 10 (sillicon power) and write speed is 8 - 9 MB/s and read speed is 16 - 17 MB/s , this is very nice SDcard
Someguyfromhell said:
Phone performance isn't affected by SDcard.
The only difference you can see is when you read/write files from SD, nothing more.
Web browsing doesn't get faster with higher class SDcard. Calling doesn't get better with higher class SDcard.
And Class 4 is enough for Android, I've never had problems with it and the speed is enough for me.
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I agree with u...but music player and video playback performance increases...and also after a reboot when u have apps installed in the sd it loads faster in the app drawer.
Sent from my SK17i using XDA App
I think you should use SD 8GB :laugh:
I'm going to buy some extra memory to replace my unknown 2GB sdcard to something better, but I only have ~5$. This is only enought for class 4 microsdhc card.
Will my music lag, skip slowly, movies lag, etc?
I'm going to use sdcard primalary for titatinium, apks, and media (movie, music)
GR0S said:
I'm going to buy some extra memory to replace my unknown 2GB sdcard to something better, but I only have ~5$. This is only enought for class 4 microsdhc card.
Will my music lag, skip slowly, movies lag, etc?
I'm going to use sdcard primalary for titatinium, apks, and media (movie, music)
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hard to say really, i dont imagine there will be any issues though as if you only have a 4 gig card then I imagine the movies you put on there arent going to be hd 1080p high profile and so the bit rates are going to be fairly low and thus the low class of the card shouldnt create any bottle necks.
da.trute said:
hard to say really, i dont imagine there will be any issues though as if you only have a 4 gig card then I imagine the movies you put on there arent going to be hd 1080p high profile and so the bit rates are going to be fairly low and thus the low class of the card shouldnt create any bottle necks.
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Seems you did not understand the question. It's about speed not size...
da.trute said:
hard to say really, i dont imagine there will be any issues though as if you only have a 4 gig card then I imagine the movies you put on there arent going to be hd 1080p high profile and so the bit rates are going to be fairly low and thus the low class of the card shouldnt create any bottle necks.
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sebarkh said:
Seems you did not understand the question. It's about speed not size...
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That's what he is talking about. Speed. 1080p movies require a faster bit rate to play well, as he said. Higher bit rate requires faster SD card. 4GB cards usually aren't fast enough.
Moreover, HD movies require humongous space, hardly accommodated by the 4GB card.
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Oomahey said:
That's what he is talking about. Speed. 1080p movies require a faster bit rate to play well, as he said. Higher bit rate requires faster SD card. 4GB cards usually aren't fast enough.
Moreover, HD movies require humongous space, hardly accommodated by the 4GB card.
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Lol. ^^
If the card is only class 4,you won't be able to record HD video. I had one previously in my old phone and it skipped and was crap. Otherwise, it will just take longer for everything else like titanium backup because the write speed is lower. If you're doing multiple things with the card like copying or backing up and playing music, you might get skipping. In my opinion its better to spend that little bit extra to go to a class 10 card
Also, 4GB might not be enough because for example the backup of just my data partition is over 2GB...
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Thanks for replies, I will get 5 $ more today and buy class 10 8 GB or 16 GB sdcard.
Hi,
I'm considering a purchase or Xperia X, but in one review (notebookcheck.net) they found very poor read/write speeds of external microSD card (only 17MB/s read and 13MB/s write - both are sequential). Have you tested it and are the speeds really so horrible? Thx.
it depends on the quality of your actual SD card being used. Currently using the Samsung Evo+ 64GB SD and I get over 50MB/s speed.
Thank you for your reaction. 50MB/s in Xperia X sounds promising . In the review (notebookcheck.net) they used Toshiba Exceria Pro M401 (very good SD card - R90/W80). Maybe compatibility problem between Xperia X and Toshiba Exceria. And your 50MB/s is read or write, or both?
robocopvn said:
it depends on the quality of your actual SD card being used. Currently using the Samsung Evo+ 64GB SD and I get over 50MB/s speed.
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With the same SD I get 30 mb/S read and 20 write. Empty and freshly formatted
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Thank you, Invicta. Your speeds are not spectacular, but I think they are sufficient.
write speeds are ok, read on the other hand is on the low side i think.
So finally I bought Xperia X and here is my experience: Sandisk Extreme 64 GB - R/W 30/30 MB/s. Speed is not the best but sufficient for me. I also tested Samsung Evo+ 32 GB, speed is lower than Sandisk. (27R/20W).
Invicta said:
With the same SD I get 30 mb/S read and 20 write. Empty and freshly formatted
Sent from my F5121 using XDA-Developers Legacy app
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I get ~50MB/s read and ~30MB/s write. Don't know if it is in the variable range of the product but 20MB/s difference over 50MB/s is alot